Sun X., Li Y., Su H. et al. · Applied Catalysis B: Environmental · 2022 · 121706
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Cu-HHTP is the best of the three conductive MOFs for two-electron ORR to H2O2, with higher onset potential, lower Tafel slope, higher H2O2 selectivity, higher FE, and higher H2O2 yield.
Caveat: Application results are electrocatalysis-specific and do not provide direct electronic conductivity or thermoelectric measurements.
4 · 3.2 ORR performances · Fig. 2 · Linked to 6 structured results
The Cu-HHTP flow-cell electrolyte immediately degraded 50 ppm Basic Fuchsin dye in the qualitative water-treatment demonstration, whereas Ni-HITP did not and Cu-HITP only partially degraded it.
Caveat: Evidence is a qualitative SI photo/caption demonstration, not a quantitative pollutant-removal assay.
S20-S21 · Supplementary figures · Figures S17-S19 · Linked to 3 structured results
Ni-HITP, Cu-HITP and Cu-HHTP were successfully fabricated as pi-conjugated conductive MOFs with layered hexagonal structures.
Caveat: Full SI table bodies and SI images were not available, so detailed fitting/statistical parameters could not be independently checked.
3 · 3.1 Morphology and structure characterization · Fig. 1 · Linked to 4 structured results
The Cu-O first coordination sphere and M-L Cu-O-C centres in Cu-HHTP promote H2O2 yield and selectivity relative to Cu-N and Ni-N centres in Cu-HITP and Ni-HITP.
Caveat: Mechanistic attribution is inferred by the authors from comparative pristine MOFs and in situ spectroscopy, not from isolated single-site model compounds.
4 · 3.2 ORR performances · Fig. 2 · Linked to 6 structured results
Lower Rct and shrinking Nyquist semicircles at reduced potentials indicate faster adsorption/desorption kinetics and improved accumulation of *OOH intermediates on Cu-HHTP.
Caveat: The exact fitted Rct table values are not present in the supplied SI text; numeric Rct entries are visual estimates from Fig. 4d.
5 · 3.4 In situ SR-FTIR and EIS analysis · Fig. 4c-d; Table S5 · Linked to 4 structured results
Electronic-regulated C sites in M-L Cu-O-C centres are proposed as the sites that bind *OOH intermediates during two-electron ORR to H2O2.
Caveat: SCN poisoning reduces currents, so metal Cu sites still influence activity; the non-metal C-site assignment is mechanistic interpretation supported by retained selectivity and FTIR bands.
4 · 3.4 In situ SR-FTIR and EIS analysis · Fig. 4 · Linked to 4 structured results
During ORR, potential-dependent dynamic *OH forms over Cu sites and shrinks the first Cu-O coordination sphere, polarising the Cu-O-C centres.
Caveat: The paper calls this a catalytic-stage structural evolution; full Table S4 values beyond those quoted in main text were not accessible from SI text.
4 · 3.3 In situ XAFS study of Cu-HHTP · Fig. 3 · Linked to 6 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Cu-HHTP conductive MOFBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Not specifiedCu sites; expected Cu1-O4 moieties · 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) | 2D · PristineLayered honeycomb-like hexagonal conductive MOF with pi-conjugated Cu-O-C centres; Cu-O coordination number near 3.8 ex situ is consistent with planar Cu1-O4 motifs. | 3 · 3.1 Morphology and structure characterization · Fig. 1; Table S2 |
| Cu-HITP conductive MOFBrowse family: Cu₃(HITP)₂ / Cu–HITP | Not specifiedCu sites; expected Cu1-N4 moieties · 2,3,6,7,10,11-hexaiminotriphenylene (HITP) | 2D · PristineLayered honeycomb-like hexagonal conductive MOF with pi-conjugated metal-ligand centres; XRD peaks assigned to [100], [200], [210], and [001] planes. | 2 · 3.1 Morphology and structure characterization · Fig. 1a; Fig. S1 |
| Ni-HITP conductive MOFBrowse family: Ni₃(HITP)₂ / Ni–HITP | Not specifiedNi sites; expected Ni1-N4 moieties · 2,3,6,7,10,11-hexaiminotriphenylene (HITP) | 2D · PristineLayered honeycomb-like hexagonal conductive MOF with pi-conjugated metal-ligand centres; XRD peaks assigned to [100], [200], [210], and [001] planes. | 2 · 3.1 Morphology and structure characterization · Fig. 1a; Fig. S1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Cu-HHTP nanorod powderresearch_0833__mat__cu_hhtp | Powder · Target Sample · Pristine Framework | Solvothermal product obtained by centrifugation after natural cooling, washed with distilled water and ethanol several times. | 2 · 2.2 Preparation of Cu-HHTP sample · Fig. 1b |
| Cu-HITP powderresearch_0833__mat__cu_hitp | Powder · Pristine Control · Pristine Framework | Prepared by the Ni-HITP solvothermal procedure using Cu(Ac)2.H2O in place of Ni(Ac)2.H2O. | 2 · 2.1 Synthesis of Ni-HITP and Cu-HITP samples |
| Ni-HITP black powderresearch_0833__mat__ni_hitp | Powder · Pristine Control · Pristine Framework | Solvothermal black powder, centrifuged, washed with distilled water and ethanol several times, then dried at 60 deg C overnight. | 2 · 2.1 Synthesis of Ni-HITP and Cu-HITP samples |